SkinCeuticals C E Ferulic Antioxidant Vitamin C Serum for Normal/Dry SkinSkinCeuticals C E Ferulic Antioxidant Vitamin C Serum is a highly concentrated antioxidant serum that is designed to provide advanced protection against environmental stressors such as UV rays and pollution. This serum contains a unique combination of 15% pure vitamin C (L ascorbic acid), 1% vitamin E (alpha tocopherol), and 0. 5% ferulic acid, which work together to provide enhanced antioxidant protection. Some of the key benefits and features of